Well, got the second 1858 from Cabelas. Nice and smooth, and typical trigger that is slightly heavier than it needs to be (to keep lawyers happy!). Popped the pale rider Konverter in it, and it runs like a champ. I took the gated Konverter and put it in the 8". Timing is perfect. Used my dremel and coarse emery wheel to cu t the channel in the recoil shield. Roughly centered it on the bevel for capping. Took about 45 minutes and 4 or 5 of the 1/2" emory drums. Hit the channel I cut with cold blue, and cleaned it up. REALLY sweet. The ejector rod was out of stock, so waiting on it. It is attached to the cylinder pin as one piece. Not to worry, though, as the first Remington 5 shot .46 Short rim fire conversions did not have an ejector rod.
Speaking of 5 shot conversions, the Kirst is 5 shot, like the original .46 Short Rim Fires. I use a hollow base, round nose .45 ACP lead bullet in a .45 Schofield case to replicate the .46 Rim fire load. The 1870s Winchester loading had a 230 grain, .451" heeled bullet with 28 grains of powder, making it virtually identical to the .45 Schofield loads issued by the Army, and nearly identical to the reduced (30 grains of BP) .45 Colt rounds, also issued by the Army. Basically, the .46 Short Rim Fire was a rim fire version of the Schofield!
Pics to follow.